Contracting device for piston-rings.



F. A. ADAMS.

CONTRACTING DEVICE FOR PISTON RINGS.

' APPLICATION FILED mac. 29. 1914.

Patented July 27, 1915.

FRANK A. ADAMS, OF ROCHESTER, NEW YORK.

CONTRACTING DEVICE FOR PISTON-RINS.

I Specification of Letters Patent. Patented July 2?, 1915.,

Continuation of application Serial No. 655,429, filed. October 18, 1911.This application filed December 29, I 1914. Serial No. 879,978..

To all whom it may concern:

Be it known that I, FRANK A. ADAMS, of Rochester, in the county ofMonroe and State of New York, have invented certain new and usefulImprovements in Contract: ing Devices for Piston-Rings; and I do herebydeclare the following to be a full, clear, and exact description of thesame, reference being had to the accompanying drawings, forming a partof this specification, and to the reference-numerals marked thereon.

The present invention relates to a device for contracting piston rings,and it has for its object to provide a simple and expedient means forholding the expansible packing rings of a piston in close engagementwithin the recesses of the piston, as the latter is inserted into itscylinder, in the assembling of therengine parts.

To these and other ends the invention consists in certain improvementsand combinations of parts all as will be hereinafter more fullydescribed, the novel features being pointed out in the claims at the endof the specification.

In the drawings: Figure 1 is a View in side elevation of one embodimentof my .invention; Fig. 2 is a sectional view, partly in elevation,showing the application of the invention to a piston and cylinder, andFig. is ]a plan view of the device shown in Similar reference numeralsthroughout the several figures indicate the same parts.

The invention may beillustrated by the present embodiment, in whichthere is provided a ring engaging member 1, preferably comprising aband, which may be formed of sheet metal and is more or less flexible.The band 1 is provided with a series of. lugs 2 by which it ispositioned against the cylinher, as shown in Fig. 2, and the ends of theband have lugs 3 bent back upon and suitably attached to the bodyportion to form bearings for the pintles 4 and 5.

'Pivotally attached to the pintle 5 is a collar 6 which is engaged by anarm 7 having a threaded portion 8, the arm being adjustable relativelyto the collar and held in adjusted position by means of the threaded nut9. Pivoted to the opposite endof the arm 7 is the lever 10 which has aconcave end adapted to engage the pintle 4, as shown a in Fig 1.

In the operation of the device, the band is first positioned around thepiston and the lever forced downwardly to the position of Fig. 1, theadJusting nut being thereupon tightened to cause the band to fit tightlyaround the piston. The lever is then released and the device removed, toenable the rlngs to be applied to the piston, after which it is agalnpositioned around the piston, and

the lever operated to engage the pintle 4 and force the opposite ends ofthe band toward each other, thus tightening the band and contracting therings within the grooves of the piston, -so that the latter may be movedinto the cylinder, the respective rings being held wlthin the recessesuntil they are entirely within the cylinder, after which they there isprovided, in the present embodiment, a beveled or flaring portion 12 atthe outer edge of the band, as shown in Fig. 2. By

such construction, if a shoulder on the pis-' ton is presented to theband, the beveled or flaring portion of the latter willmeet theshoulder, permitting the piston to move within the band and thus obviateany looking of the parts. After the piston has been moved within thecylinder, the device is removed by simply throwing back the lockinglever beyond its dead center or locking position, so that the one end ofthe band is'released, and the latter may be then pulled off from thepiston; v

The advantages of theinvention, as illustrated in the embodiment hereinshown and described, are that the device is applicable.

in its use to pistons of varying'diameters, being readily adjustablefrom one size to another, and that it may be quicklyapplied to orremoved from a piston. This is essential,-'especially where the spacebetween the engine parts 'does not permit suflicient removal of thepiston from the cylinder to position'the device over the end of thepiston sothat the device must be slipped on from one side.

A further advantage resides in the provi- 1 sion of means whereby thePossibility of locking engagement between an oil recess of i the pistonand the edge of the ring engaging member is efiectively overcome;

I claim as' my invention: 1. A piston ring contracting device comprisinga flexible ring engaging member having separable ends, cylinder engagingmeans-at one side of the ring engaging member, a beveledor outwardlyflaring portion at the opposite side of the same, and means for drawingthe ends of the. ring engaging member toward each other. 7

- 2 A. piston ring contracting device comprising a.flexib1e.- ringengaging member or outwardly flaring portion at the opposite g5 edge.

FRANK A. ADAMS. Witnesses G. WILLIARD R1011, RUssELL B9 GRIFFITH.

